<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>按钮样式</title>
  <link rel="stylesheet" href="./Bootstrap/css/bootstrap.min.css">
</head>
<body>
  <button class="btn btn-success btn-lg">按钮1</button>
  <button class="btn btn-warning btn-sm">按钮2</button>
</body>
</html>